Improvement in Efficiency of the Electrocatalytic Reduction of Hydrogen Peroxide by Prussian Blue Produced from the [Fe(CN)5(mpz)]2– Complex. Issue 13 (5th April 2017)

• Record Type: Journal Article
• Authors: Monteiro, Marcio C.; Toledo, Kalil C. F.; Pires, Bruno M.; Wick, René; Bonacin, Juliano A.
• Is Part Of: European journal of inorganic chemistry. Issue 13(2017)
• Page Start: 1979
• Page End: 1988
• Publication Date: 2017-04-05
• Subjects: Electrochemistry -- Reduction -- Iron -- Thin films; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201601540
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Hydrogen peroxide is one of the most important molecules in chemical signaling in living organisms. Because of this, its sensing is indispensable for the diagnosis of many diseases. Among the materials used for the detection and quantification of H2 O2, Prussian Blue (PB) has been highlighted due to its performance. Therefore, the search for alternatives or the improvement of PB performance is a challenge. In this context, our motivation was to evaluate how the ligand N ‐methylpyrazinium affects the structure and reactivity of Prussian Blue films produced from [Fe(CN)5 (mpz)] 2– (PB‐mpz). Based on the results, it was possible to conclude that the ligand is coordinated to the complex inside the PB framework and consequently contributes to the generation of a noncrystalline structure. The ions contained in buffer solutions can react with Prussian Blue by binding to Fe 3+ and breaking the structure. In addition, a PB‐mpz film in HCl/KCl showed higher sensitivity towards H2 O2 than a PB film. Abstract : Molecular films of Prussian Blue produced from the [Fe(CN)5 (mpz)] 2– complex have a noncrystalline structure that permits their use in the detection of hydrogen peroxide with an improved electrochemical response when compared with Prussian Blue films obtained by traditional methods.